Uzi Tools - Free Online Calculators and Utilities
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9 Tools Available

Free Health & Fitness Calculators

Free online health calculators: BMI, BMR, TDEE, body fat, calories, water intake, sleep cycles, ideal weight. All processing in your browser—no signup, no data stored.

BMI Calculator

Calculate your Body Mass Index (BMI) from height and weight to assess your weight category.

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BMR / TDEE Calculator

Estimate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) to understand your daily calorie needs.

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Body Fat Percentage Calculator

Estimate your body fat percentage using the US Navy method, a simple measurement-based calculation.

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Daily Calorie Intake Calculator

Get personalized daily calorie targets for weight maintenance, loss, or gain based on your body metrics and activity.

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Water Intake Calculator

Estimate your daily hydration needs based on your weight and activity level to stay properly hydrated.

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Sleep Cycle Calculator

Find optimal bed and wake times based on 90-minute sleep cycles to wake up feeling refreshed.

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Ideal Body Weight Calculator

Estimate your ideal body weight using the Devine formula, a height-based calculation for health reference.

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Pregnancy Due Date Calculator

Estimate your baby's due date from the first day of your last menstrual period (LMP) or conception date.

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Ovulation & Fertility Calculator

Predict your fertile window and ovulation date from your cycle length and last period for family planning.

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Frequently Asked Questions